<head>  
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
<title>By：DragonDean</title>  
<link rel="stylesheet" type="text/css" href="bootstrap.min.css">  
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<body>  
  <div class="main" style="margin:0 auto;width:230px;height:350px;border:1px solid;padding:5px;" > </div>  
<script type="text/javascript" src="jquery-3.2.0.min.js"></script>  
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